EP2442119B1 - Verfahren und elektrische Schaltung zum Testen eines an ein elektrisches Energieversorgungsnetz anschließbaren Energieerzeugers oder Energieverbrauchers - Google Patents

Verfahren und elektrische Schaltung zum Testen eines an ein elektrisches Energieversorgungsnetz anschließbaren Energieerzeugers oder Energieverbrauchers Download PDF

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Publication number
EP2442119B1
EP2442119B1 EP11184336.3A EP11184336A EP2442119B1 EP 2442119 B1 EP2442119 B1 EP 2442119B1 EP 11184336 A EP11184336 A EP 11184336A EP 2442119 B1 EP2442119 B1 EP 2442119B1
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EP
European Patent Office
Prior art keywords
switch
voltage
terminal point
vpcc
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Application number
EP11184336.3A
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German (de)
English (en)
French (fr)
Other versions
EP2442119A2 (de
EP2442119A3 (de
Inventor
Norbert Niesel
Jörg Janning
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GE Energy Power Conversion GmbH
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GE Energy Power Conversion GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GE Energy Power Conversion GmbH filed Critical GE Energy Power Conversion GmbH
Publication of EP2442119A2 publication Critical patent/EP2442119A2/de
Publication of EP2442119A3 publication Critical patent/EP2442119A3/de
Application granted granted Critical
Publication of EP2442119B1 publication Critical patent/EP2442119B1/de
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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G01R31/343—Testing dynamo-electric machines in operation
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/34—Testing dynamo-electric machines
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/40—Testing power supplies
    • G01R31/42—AC power supplies
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P29/00—Arrangements for regulating or controlling electric motors, appropriate for both AC and DC motors
    • H02P29/02—Providing protection against overload without automatic interruption of supply
    • H02P29/024—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load
    • H02P29/0241—Detecting a fault condition, e.g. short circuit, locked rotor, open circuit or loss of load the fault being an overvoltage
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
    • H02P9/10—Control effected upon generator excitation circuit to reduce harmful effects of overloads or transients, e.g. sudden application of load, sudden removal of load, sudden change of load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D17/00—Monitoring or testing of wind motors, e.g. diagnostics
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/20—Wind motors characterised by the driven apparatus
    • F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
    • F03D9/255—Wind motors characterised by the driven apparatus the apparatus being an electrical generator connected to electrical distribution networks; Arrangements therefor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
    • H02P2101/00—Special adaptation of control arrangements for generators
    • H02P2101/15—Special adaptation of control arrangements for generators for wind-driven turbines

Definitions

  • the invention relates generally to a method and an electrical circuit for testing an energy generator or energy consumer that can be connected to an electrical energy supply network.
  • the energy producers and energy consumers can be generators, motors, fuel cells, solar inverters, so-called power conditioning systems or other electrical components that can be connected to an energy supply network.
  • the invention relates to a method and an electrical circuit for testing a generator of a wind power plant. It goes without saying that the invention also applies to a hydropower plant or a gas-fired power plant or the like can be used.
  • wind power plants For generating electrical energy, wind power plants are known in which a generator is driven with the aid of a wind turbine exposed to the wind. The generated electrical energy is then fed into an energy supply network.
  • those electrical components which are used to generate electrical energy are tested separately, that is to say independently of the wind turbine, with the aid of electrical simulation circuits.
  • a wind simulation can be implemented with the aid of an electric motor with which a desired wind is simulated and which then acts on the generator.
  • a network simulation that simulates an energy supply network into which the generator feeds the generated electrical energy. This network simulation is electrically connected to the generator or the associated converters.
  • the network simulation can be influenced in such a way that a desired voltage curve of the energy supply network is generated with an adjustable frequency and can be specified for the generator.
  • the object of the invention is thus to create a method and an electrical circuit with which any voltage peaks can be freely set at any frequency.
  • the invention achieves this object by the method according to claims 1 and 6.
  • the invention also achieves this object by means of electrical circuits according to claims 4 and 8.
  • the energy producer or energy consumer is connected to a connection point.
  • a converter circuit is available with which a voltage present at the connection point can be influenced.
  • the converter circuit is connected to the connection point via a transformer.
  • There is a series circuit which is made up of a choke coil and a first switch and which is connected to the connection point.
  • the first switch is first closed and the converter circuit is influenced in such a way that the voltage at the connection point has a desired value, and the first switch is then opened.
  • the excess voltage of the simulated power supply network is generated by the interaction of several measures. Closing the first switch causes a voltage drop at the connection point. This voltage drop is counteracted by influencing the converter circuit accordingly. The subsequent opening of the first switch then leads to an increase in the voltage at the connection point.
  • This procedure has the advantage that a simulated voltage increase can be achieved in a simple manner without significant additional effort.
  • the testing of the energy generator or energy consumer can thus be significantly simplified and improved.
  • the energy generator or energy consumer is connected to a connection point at which a voltage is applied.
  • a series circuit which is made up of a choke coil and a first switch and which is connected to the connection point.
  • a parallel circuit which is made up of a choke coil and a second switch, and which is connected to the connection point.
  • the series circuit is subjected to a voltage that is greater than the voltage at the connection point. In a timed manner, on the one hand, the first switch is closed, so that the voltage at the connection point increases, and, on the other hand, the second switch is opened.
  • the voltage increase of the simulated consumer is achieved by closing the first switch and opening the second switch.
  • closing the first switch the voltage acting on the series circuit reaches the connection point and leads to a voltage increase there.
  • Opening the second switch means that an increased voltage can develop at the connection point.
  • This procedure has the advantage that a simulated voltage increase can be achieved with little effort.
  • Another advantage of the present embodiment of the invention is that no converter circuit is absolutely necessary here. Testing the Energy producer or energy consumer can thus be significantly simplified and improved.
  • a converter circuit which is connected to the parallel circuit and with which the voltage present at the connection point can be influenced.
  • the first switch is closed and, on the other hand, the converter circuit is influenced in such a way that the voltage at the connection point changes to an increased value in a time-coordinated manner.
  • the way in which the voltage at the connection point is transferred to the increased voltage can be influenced with the aid of the converter circuit.
  • GTO gate turn-off
  • IGBT insulated gate bipolar transistor
  • the inductance (s) of the choke coil (s) is / are adjustable. In this way, voltage drops of the same type can be achieved at different frequencies of the simulated power supply network.
  • Figure 1 shows a schematic block diagram of a first exemplary embodiment of an electrical circuit according to the invention for testing a generator, in particular a wind power plant
  • Figure 2 shows a schematic block diagram of a second embodiment of a corresponding electrical circuit.
  • an electrical circuit 10 is shown, which is used in the present exemplary embodiment in connection with a wind turbine. It goes without saying that the circuit 10 can also be used in a hydroelectric power station or in a gas-fired thermal power station or the like. Furthermore, the circuit 10 is provided in the present exemplary embodiment for testing a generator. It goes without saying that other energy producers or energy consumers can also be tested with the circuit 10, for example an electric motor or a fuel cell or a solar inverter or a so-called power conditioning system or the like can also be tested.
  • the circuit 10 is in FIG Figure 1 for the sake of simplicity essentially only shown single-phase. It goes without saying that the circuit 10 can also be designed with two or more phases.
  • the circuit 10 has a generator circuit 12 which is to be tested.
  • the generator circuit 12 is those components of the wind turbine that are used to generate electrical energy.
  • the generator circuit 12 is made up, for example, of a double-fed asynchronous generator 13 associated converters 14 built.
  • the rotor of the asynchronous generator 13 is connected to a connection point of the generator circuit 12 via the converter, and the stator of the asynchronous generator 13 is connected directly to this connection point.
  • generator types can also be used, for example synchronous generators, and / or that no converters can be present either.
  • the circuit 10 has a wind simulation 17 which, in the present exemplary embodiment, is intended to simulate the wind driving the asynchronous generator 13.
  • the wind simulation 17 is composed of a transformer 19 connected to an energy supply network 18, a converter circuit 20 and an electric motor 21.
  • the drive shaft of the electric motor 21 is connected in a rotationally fixed manner to the drive shaft of the generator 13 via a possibly interposed gear 22.
  • the converter circuit 20 can be influenced over time in such a way that the resulting speed curve of the electric motor 21 corresponds to a desired wind driving the asynchronous generator 13.
  • the electrical circuit 10 does not have to be set up locally directly at the wind power plant, but can be accommodated, for example, in a test hall independently of the wind power plant. It goes without saying, however, that the circuit 10 can also be present directly at the wind turbine. If, in this case, the generator circuit 12 is installed in the wind power plant, that is to say, in particular, if the asynchronous generator 13 is connected to the wind turbine of the wind power plant in a rotationally fixed manner, then the wind simulation 17 can be omitted without replacement.
  • the electrical circuit 10 has a network simulation 27 which simulates the voltage profile over time To simulate the power supply network.
  • the generator circuit 12 feeds electrical energy into this simulated energy supply network.
  • the network simulation 27 is made up of a transformer 28 connected to the energy supply network 18, a converter circuit 29 and a further transformer 30.
  • the converter circuit 29 is connected to the generator circuit 12 via the further transformer 30, in the present exemplary embodiment to the mentioned connection point of the generator circuit 12.
  • Starting from this connection point of the generator circuit 12, there is a further connection point P on the connection to the transformer 30, at which a Voltage Vpcc is applied (pcc point of common coupling).
  • the further transformer 30 can alternatively also be replaced by a choke coil. This is particularly cost-effective when the transformation ratio of the transformer 30 is not required.
  • a common DC voltage rail is present between the two converter circuits 20, 29 of the wind simulation 17 and the network simulation 27. In this case, only a single network-side converter and only a single transformer in the direction of the power supply network 18 are required.
  • a series circuit of a choke coil 31 and a first switch 32 is connected to the connection point P.
  • the order within the series circuit is irrelevant, so that the switch 32 can also be connected to the connection point P.
  • the series connection can be connected to a star point of several phases. It is also possible that the series connection is part of a delta connection of several phases. If necessary, the series circuit can also be connected to ground.
  • a filter circuit 33 is connected between the converter circuit 29 and the transformer 30.
  • the inductance of the choke coil 31 can be changed. This can be achieved, for example, in that the number of turns of the choke coil 31 can be set manually by means of mechanical devices. With the aid of appropriate settings of the choke coil 31, essentially similar courses of the simulated energy supply network can be generated, to be precise independently of the frequency of the simulated energy supply network.
  • the first switch 32 is designed as an electronic power semiconductor component.
  • the filter circuit 33 can be known electrical circuits by means of which the voltage Vpcc can be smoothed.
  • the converter circuit 29 can be influenced over time in such a way that the resulting time profile of the voltage Vpcc corresponds to a desired predetermined voltage profile of an energy supply network.
  • the specified voltage curves can be set symmetrically or asymmetrically. It can also use different frequencies of the simulated power supply network Converter circuit 29 can be set freely, in particular 50 Hertz and 60 Hertz.
  • control and / or regulation 34 is provided to switch the switch 32 from a closed to an open state and vice versa. It is assumed below that the switch 32 is in its open state and the choke coil 31 is therefore not effective.
  • a generator circuit 12 to be tested can be exposed to a desired wind by means of the wind simulation 17 and to a predetermined voltage profile of the supplied energy supply network by means of the network simulation 27.
  • the electrical circuit 10 is therefore suitable, inter alia, for testing the behavior of the generator circuit 12 in the event of a single-phase or multiphase increase in the voltage of the supplied energy supply network for a predetermined overvoltage.
  • the converter circuit 29 is used to set the voltage Vpcc to a desired value for the voltage of the supplied energy supply network.
  • the network simulation 27 carries out two measures in a manner coordinated with one another in terms of time.
  • the first switch 32 is switched to its closed state so that the voltage Vpcc is applied across the reactor 31. This in itself leads to a voltage drop in the voltage Vpcc, which, however, is compensated by the converter circuit 29 in that the voltage Vpcc continues to be controlled or regulated to the desired value for the voltage of the supplied energy supply network.
  • the switch 32 is then switched to its open state. This has an increase in Voltage Vpcc.
  • the overvoltage that can be achieved in this way depends, among other things, on the voltage applied to the transformer 30. The course and the extent of the voltage increase can additionally be influenced or supported by the converter circuit 29.
  • the measures mentioned are not carried out at the same time, but run in a largely coincident time range. What is essential is the timing of the two measures with one another in such a way that the transition to the desired increase in voltage of the simulated energy supply network fed by the generator circuit 12 has the desired course.
  • the explained measures can be used to simulate an increase to a predetermined overvoltage in that energy supply network into which the generator circuit 12 feeds electrical energy. It can thus be tested how the generator circuit 12 behaves in such a case. In particular, it can be checked whether the generator circuit 12 fulfills so-called fault-ride-through conditions.
  • the two measures explained are reversed again by the network simulation 27.
  • the converter circuit 29 can be influenced in such a way that the voltage Vpcc goes back to the actually desired value for the voltage of the supplied energy supply network. This transition can be supported by temporarily closing the first switch 32.
  • circuit 10 of the Figure 1 includes circuit 40 of the Figure 2 a parallel connection of a choke coil 42 and a second switch 43. Furthermore, the transformer 28 has an additional winding 28 ′, which is connected to the switch 32. The translation of the additional winding 28 'to the primary winding of the transformer 28 is selected such that the voltage on this winding 28' is greater than the desired value for the voltage of the simulated power supply network provided as voltage Vpcc.
  • circuit 40 of the Figure 2 no further transformer 30. It should be noted that the further transformer 30 of the Figure 1 as such also in the circuit 40 of the Figure 2 may be present.
  • the aforementioned parallel connection of the choke coil 42 and the second switch 43 is connected between the converter circuit 29 and the connection point P. If the further transformer 30 is present, the parallel connection between this further transformer 30 and the connection point P is connected. The further transformer 30 can, however, also be connected between the connection point P and the aforementioned parallel connection.
  • the inductance of the choke coil 42 can be changed. This can be achieved, for example, in that the number of turns of the choke coil 42 is manually adjustable by means of mechanical devices.
  • the second switch 43 is designed as an electronic power semiconductor component.
  • GTO gate turn-off
  • IGBT insulated gate bipolar transistor
  • control and / or regulation 34 is provided to switch the second switch 43 from a closed to an open state and vice versa. It is assumed below that the switch 32 is in its open state and the switch 43 is in its closed state. Both choke coils 31, 42 are thus ineffective.
  • the network simulation 27 carries out three measures in a manner coordinated with one another in terms of time.
  • the second switch 43 is opened and, on the other hand, the converter circuit 29 is influenced in such a way that the voltage Vpcc changes over to the desired predetermined overvoltage with a desired transition behavior.
  • the first switch 32 is switched to its closed state, so that the voltage of the winding 28 ′ of the transformer 28 is applied to the connection point P via the choke coil 31.
  • the desired overvoltage is therefore dependent, among other things, on the voltage present at the winding 28 ′ of the transformer 28.
  • the three measures do not have to be carried out at the same time, but rather take place in a largely coincident time range.
  • the order of the measures mentioned is not in the foreground. What is essential is the timing of the three measures with one another in such a way that the The transition to the desired increase in voltage of the simulated power supply network fed by the generator circuit 12 has the desired course.
  • the three measures are synchronized with one another in such a way that first the second switch 43 is opened and then the switch 32 is closed in order to then influence the voltage Vpcc with the aid of the converter circuit 29 in such a way that it changes to the predetermined overvoltage. At least the three measures are timed in such a way that the switch 43 is opened in a period of time before a voltage increase in the voltage Vpcc is simulated.
  • the transformer 28 is directly connected to the parallel connection explained.
  • the second switch 43 can be opened first and then the switch 32 can be closed.
  • the increased voltage of the winding 28 ′ of the transformer 28 is then applied to the connection point P via the choke coil 31.
  • the explained measures can be used to simulate an increase in the voltage in that energy supply network into which the generator circuit 12 feeds electrical energy. It can be used to test how the Generator circuit 12 behaves in these cases. In particular, it can be checked whether the generator circuit 12 fulfills the fault-ride-through conditions already mentioned.
  • the three measures explained are reversed by the network simulation 27.
  • it does not depend on the simultaneity or the sequence of the measures, but on their timing with one another. For example, first the first switch 32 is opened and then the second switch 43 is switched to its closed state, in order then to influence the converter circuit 29 in such a way that the voltage Vpcc drops again to a desired value.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Control Of Eletrric Generators (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Testing Electric Properties And Detecting Electric Faults (AREA)
EP11184336.3A 2010-10-14 2011-10-07 Verfahren und elektrische Schaltung zum Testen eines an ein elektrisches Energieversorgungsnetz anschließbaren Energieerzeugers oder Energieverbrauchers Active EP2442119B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010048541A DE102010048541A1 (de) 2010-10-14 2010-10-14 Verfahren und elektrische Schaltung zum Testen eines an ein elektrisches Energieversorgungsnetz anschließbaren Energieerzeugers oder Energieverbrauchers

Publications (3)

Publication Number Publication Date
EP2442119A2 EP2442119A2 (de) 2012-04-18
EP2442119A3 EP2442119A3 (de) 2018-01-17
EP2442119B1 true EP2442119B1 (de) 2021-03-31

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EP11184336.3A Active EP2442119B1 (de) 2010-10-14 2011-10-07 Verfahren und elektrische Schaltung zum Testen eines an ein elektrisches Energieversorgungsnetz anschließbaren Energieerzeugers oder Energieverbrauchers

Country Status (5)

Country Link
US (1) US9075116B2 (da)
EP (1) EP2442119B1 (da)
CN (1) CN102565565B (da)
DE (1) DE102010048541A1 (da)
DK (1) DK2442119T3 (da)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011056172A1 (de) * 2011-12-08 2013-06-13 GL Garrad Hassan Deutschland GmbH Prüfeinrichtung zur Durchführung von Funktionstests an Energieerzeugern
CN106772046B (zh) * 2016-12-30 2023-02-24 贵州大学 一种自定义电气环境下的电机综合试验设备
DE102017115513B3 (de) * 2017-07-11 2018-05-30 Woodward Kempen Gmbh Vorrichtung und Verfahren zum Überprüfen des elektro-dynamischen Verhaltens eines Antriebsstrangs einer Stromerzeugungseinrichtung am Netz

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JP3901088B2 (ja) * 2002-12-26 2007-04-04 ソニー株式会社 電源回路及び電子機器
US8723365B2 (en) * 2006-06-16 2014-05-13 Ecole Polytechnique Federale De Lausanne (Epfl) Device for feeding a charge including integrated energy storage
ES2308918B1 (es) * 2007-04-11 2009-10-23 Fundacion Circe-Centro De Investigacion De Recurso Y Consumos Energeticos Equipo generador de huecos de tension.
DE102007028077B4 (de) * 2007-06-15 2009-04-16 Sma Solar Technology Ag Vorrichtung zur Einspeisung elektrischer Energie in ein Energieversorgungsnetz und Gleichspannungswandler für eine solche Vorrichtung
DE102008049629A1 (de) * 2008-09-30 2010-04-08 Repower Systems Ag Windenergieanlagenprüfeinrichtung
DE102009018377A1 (de) * 2009-04-23 2010-10-28 Converteam Gmbh Verfahren und elektrische Schaltung zum Testen eines an ein elektrisches Energieversorgungsnetz anschließbaren Energieerzeugers oder Energieverbrauchers

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Also Published As

Publication number Publication date
US9075116B2 (en) 2015-07-07
EP2442119A2 (de) 2012-04-18
US20120092023A1 (en) 2012-04-19
EP2442119A3 (de) 2018-01-17
DE102010048541A1 (de) 2012-04-19
CN102565565A (zh) 2012-07-11
CN102565565B (zh) 2015-09-09
DK2442119T3 (da) 2021-06-28

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